Preliminary data on growth and enzymatic abilities of soil fungus Humicolopsis cephalosporioides at different incubation temperatures

Soil mycobiota under managed and unmanaged forests of <i>Nothofagus pumilio</i> in Tierra del Fuego, Argentina

“…Since temperature can also affect nutrient recycling in N. pumilio forests and consequently influence soil biological activity (including microfungi and their enzymes), further analysis is necessary to demonstrate whether these differences in the diversity of microfungi are in fact related to the amount and availability of specific nutrients. Preliminary studies on the in-vitro conditions of H. cephalosporioides, a fungus with a high frequency in forest soils of N. pumilio in Tierra del Fuego, revealed that its enzyme activity is affected by the temperature of incubation (Elíades et al 2015). All study sites were exposed to the same stressful conditions that prevailed due to the seasonal presence of snow (characteristic of the sub-Antarctic climate) but this did not seem to have affected fungal diversity in the harvested forest with shelter wood.…”

“…In forest ecosystems, they perform essential ecological functions including decomposition of organic matter and nutrient cycling and are involved in biotic interactions such as mycorrhizal symbioses. Understanding whether in most processes that occur in the forest soil, such as the ones related to soil formation, nutrient availability and recycling of organic matter (Elíades et al 2015). However, anthropic activities such as management practices can affect the forest productivity and the level of timber harvesting that the forest can sustain as well as the number and quality of habitats and of the associated biodiversity (Martínez Pastur et al 2002).…”

“…Scorsetti et al (2012) described the pathogenic and enzyme activities of the entomopathogenic fungus Tolypocladium cylindrosporum (Ascomycota: Hypocreales) from N. pumilio forests in Tierra del Fuego, Argentina. More recently, Elíades et al (2015) reported preliminary data on the growth and enzymatic abilities of the soil fungus Humicolopsis cephalosporioides at different incubation temperatures collected under N. pumilio forests. However, studies comparing the soil fungal composition and diversity among forests dominated by the same tree species but under different management practices and periods of time since intervention are scarce.…”

Estudio de las melaninas de <i>Pseudocercospora griseola</i>, agente causante de la mancha angular del poroto y rol biológico

“…A pesar de la disponibilidad de un stock de 45 aislamientos de P. griseola conservados a -20 ºC en papeles de filtro (Stenglein, 2007) Se sabe que algunos hongos pueden presentar variabilidad fisiológica entre aislamientos de la misma especie (Elíades et al, 2015). En Humicolopsis cephalosporioides (phylum Ascomycota) dependiendo del medio y de la temperatura de incubación hay variación intraespecífica en el crecimiento y la actividad enzimática entre los distintos aislamientos estudiados (Elíades et al, 2015). Bipolaris sorokiniana (phylum Ascomycota) tiene un alto grado de variabilidad fenotípica y genética entre aislamientos (Oliveira et al, 2002).…”

“…La misma abarca los distintos ecosistemas, especies, genes y su abundancia relativa (Crisci, 2001). Se estima que el número de especies fúngicas reconocidas hasta el momento es de 1,5 millones (Hawksworth, 2004), existiendo ejemplos representativos de especialización fisiológica entre representantes pertenecientes a una especie fúngica determinada (Elíades et al, 2015).…”